【摘要】 用静态吸附法研究了改性凹凸棒石对碱性蓝54的吸附特性,探讨了初始pH值、温度以及染料初始浓度等因素的影响。结果表明吸附动力学较好地符合Lagergren二级吸附速率方程。利用两种等温线方程对吸附过程进行拟合,显示不同温度下的吸附等温式都与Langmuir方程符合。热力学分析表明,吸附过程吸热,吸附焓变△H和熵变△S均为正值,吸附自由能变△G为负值。更多还原

【Abstract】 The effects of pH value,temperature and initial concentration of basic blue 54 on adsorption have been investigated through batch experiments of adsorbing basic blue 54 by modified attapulgite.The adsorption kinetics fit well with Lagergren-second-order.Two isotherm models were adopted to describe the adsorption.And the adsorption isotherms in different temperature were in accordance with the Langmuir equation and thermodynamics evaluation showed that the adsorption process was endothermic.The enthalpy changes(△H) and the entropy changes(△S) were positive,while the free energy changes(△G) were negative.更多还原